Rental cars, hotel rooms, airline tickets—you can comparison shop and buy them all online relatively easily. So given business aviation’s devotion to innovation and its emphasis on time savings and efficiency, why can’t you search for and book a charter flight on the Web with the same level of ease?

Apps for booking charter flights on smartphones and tablets continue to mature as accepted wisdom loses weight: it turns out that more and more convenience-minded customers are indeed willing to consummate five- and six-figure transactions without speaking to a human.

You’ve long been able to obtain ultra-large-cabin comfort for around $10 million by converting a used regional commuter jet into a first-class executive aircraft. That has seemed like a hard-to-beat bargain for business jet travelers who crave roomy cabins—until now.

Maybe your group is too big to fit in a large-cabin business jet, or perhaps you and your travel companions simply want more space than those aircraft provide. Either way, you may be a candidate to charter a so-called bizliner—an airliner model that has been reconfigured for private use.